• Proceedings of the PSK Conference
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• 2003.10b
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• pp.190.3-190.3
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• 2003

Three new butenolides (1-3), and a new cyclopentenone derivative (4) were isolated from a marine sponge Homaxinella sp. by bioactivity guided fractionation. The gross structures were established on the basis of NMR and MS analyses. The stereochemistry of the butenolides and cyclopentenone derivative was defined on the basis of optical rotation and CD spectroscopy. The compounds were tested against a panel of five human solid tumor cell lines and displayed marginal to significant cytotoxicity.

• Proceedings of the Korean Geotechical Society Conference
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• 2003.03a
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• pp.761-766
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• 2003

In environmental and economical views Plastic Board Drain(PBD) has many problems which is generally used in improving soft grounds. In order to improve these, Rags drain and Sponge drain are developed in this study, and the application to drains is presented though comparing with PDB and Sand drain In consolidation effects. Test results show that the consolidation effects, including consolidation rate and stregth, increase in order of Sand and Rags, PDB and Sponge drain.

• Journal of the Korean Magnetic Resonance Society
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• v.18 no.2
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• pp.82-88
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• 2014

Three bicyclic and one monocyclic sesquiterpenoids were isolated from the marine sponge Topsentia species. Their planar structures were completely determined from a combination of extensive 1D and 2D NMR experiments, and also the relative stereochemistry on the chiral centers were established by the ROESY experiment. Compound 1 was determined as a new stereoisomer. Furthermore, the NMR spectral data for compounds 2 and 4, of which have not been reported, were listed. Four compounds did not show any cytotoxicity, instead compound 4 exhibited moderate antifungal activity against Candida albicans.

• Journal of Species Research
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• v.9 no.2
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• pp.147-161
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• 2020

Seven new species of two genera Scalarispongia and Smenospongia (Demospongiae: Dictyoceratida: Thorectidae) are described from Gageo Island and Jeju Island, Korea. Five new species of Scalarispongia are compared to nine reported species of the genus by the skeletal structure. Scalarispongia viridis n. sp. has regular ladder-like skeletal pattern arranged throughout the sponge body and has pseudo-tertiary fibres. Scalarispongia favus n. sp. is characterized by the honeycomb shape of the surface and is similar to Sc. flava in skeletal structure, but differs in sponge shape. Scalarispongia lenis n. sp. is similar to Sc. regularis in skeletal structure but has fibers that are smaller in size. Scalarispongia canus n. sp. has irregular skeletal structure in three dimensions and ladder-like which comes out of the surface and choanosome. Scalarispongia subjiensis n. sp. has pseudo-tertiary fibres and its regular ladder-like skeletal pattern occurs at the choanosome. Two new species of Smenospongia are distinguished from the other 19 reported species of the genus by the skeletal structure. Smenospongia aspera n. sp. is similar to Sm. coreana in sponge shape but new species has rarely secondary web and thin and thick bridged fibres at near surface. Smenospongia mureungensis n. sp. has very simple skeletal structure.

• Animal cells and systems
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• v.2 no.1
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• pp.21-26
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• 1998

Three species of Poecilosclerid sponge (class Demospongiae, subclass Ceractinomorpha) are newly described from the waters around Cheju Island Keomun Island and Keoje Island. They are Antho (Plocamia) bakusi, Clathria (clathria) koreana and Oxymycale rhoi.

• Animal Systematics, Evolution and Diversity
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• v.18 no.1
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• pp.59-63
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• 2002

Some marine sponges were collected from intertidal zone of Jeju Island with hands during the period from 2000 to 2002 Among them, two species, Strongylacidon conulosa Bergquist and Fromont, 1988 and Haliclona brøndstedi Bergquist and Warne, 1980 are newly recorded in Korea.

• Natural Product Sciences
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• v.4 no.3
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• pp.158-160
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• 1998

A new oxygenated furano sesquiterpene [1] has been isolated from the sponge Dysidea fragilis collected from Mandapam coast, Tamilnadu, India and its structure was determined by analysis of spectral data.

• Natural Product Sciences
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• v.13 no.3
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• pp.247-250
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• 2007

A new sphingosine (1) was isolated from the MeOH extract of a marine sponge Haliclona (Reniera) sp. by bioactivity-guided fractionation. The 1D and 2D NMR, and MS spectroscopic analyses were used to establish the planar structure of 1. The stereochemistry of the compound was defined on the basis of modified Mosher's method, comparison of optical rotation and NMR data with those of the reported. Compound 1 was mildly cytotoxic to a panel of five human solid tumor cell lines.

• Journal of the Korean Magnetic Resonance Society
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• v.15 no.2
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• pp.128-136
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• 2011

A new sesterterpenoid, phorbaketal derivative, was isolated from the marine sponge Phorbas species. Its planar structures was completely determined from a combination of extensive 1D and 2D NMR experiments and MS data, and also the stereochemistry on the chiral centers were established by the ROESY experiment and the comparison with the $^1H$ and $^{13}C$ chemical shifts of the known phorbaketal compounds. This compound 1 moderately showed cytotoxicity effect against hepatoma cancer HepG2 cell.

• Natural Product Sciences
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• v.9 no.4
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• pp.232-234
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• 2003

A new glycerol ether has been isolated from a marine sponge Stelletta sp. By bioactivity-guided fractionation. The structure was established on the basis of NMR and MS analyses. The compound was evaluated for cytotoxicity against a small panel of five human tumor cell lines and exhibited significant cytotoxicity.